TWO APPS IN ONE

Cosmos Chat is two things:

1. A private AI chat app with 12+ personas you can talk to directly, with voice and image support.
2. A shared AI engine that other Cosmos One apps (Scanner, Calendar, Terminal, and more) plug into for their AI features.

Install Cosmos Chat once, download the AI model once, and every Cosmos One app on your phone can use this app's AI brain. No duplicate model downloads, no separate setup in each app.

You'll see a small persistent notification saying "AI service ready" — that is the shared AI staying loaded in memory so it responds instantly when another Cosmos app asks for it. This notification can be hidden or muted in Android's notification settings if you prefer.

Everything happens on your device. No cloud, no account, no tracking.

POWERED BY GEMMA 4

Built on Google's latest Gemma 4 on-device AI model, delivering intelligent, context-aware responses that run entirely on your phone. No cloud API, no token limits, no latency — just fast, capable AI at your fingertips. You can also choose from alternative models to match your device's capabilities.

MEET YOUR AI CREW

Chat directly with 12+ unique AI personas — each with their own personality and expertise, from a creative writer and code buddy to a stoic philosopher, fitness coach, and dad-joke machine. Every persona has a distinct voice, greeting, and personality traits designed for a specific kind of help.

VOICE IN, VOICE OUT

Talk to your AI using speech-to-text, and hear responses read back with natural-sounding voices. Supports English, Chinese, Korean, Japanese, and Cantonese input. Choose from 11 English voice styles for AI responses, or use your device's built-in text-to-speech for other languages.

SEE AND UNDERSTAND

Send images to your AI personas and get intelligent responses. Ask about photos, get descriptions, or use images as conversation context — all processed locally on your device.

SMART SEARCH

Find past conversations using semantic search powered by a local embedding model. Search by meaning, not just keywords.

HOW THE SHARED AI SERVICE WORKS

When another Cosmos One app on your phone needs AI, it asks Cosmos Chat directly. Nothing leaves your device. The shared service:

- Only responds to Cosmos One apps that you have installed yourself
- Never connects to the internet to share your data
- Uses minimal battery when idle (just keeps the AI model in memory)
- Shows an ongoing notification so you always know when the AI is active
- Can be turned off any time by force-stopping Cosmos Chat in Android settings

100% OFFLINE AND PRIVATE

After the initial model download, Cosmos Chat never needs the internet. Your conversations stay on your device. No data is sent to any server. No account or login required. No tracking, no analytics, no cloud processing.

FREE TO USE, PREMIUM TO UNLOCK MORE

Cosmos Chat is free with ads. A one-time purchase removes all ads and unlocks premium personas — specialist AI characters with curated knowledge bases that are updated regularly to keep their expertise current. No subscriptions.

REQUIREMENTS

- Android 8.0 or higher
- 4 GB RAM minimum (8 GB recommended)
- 3-4 GB storage for AI models (downloaded after install)

Cosmos Chat is built for people who value privacy, travel without reliable internet, or simply want an AI assistant that works anywhere — on a plane, underground, or off the grid.

Cosmos One

Additional Information